Cough-syncope is where someone passes out from severe coughing. Having seizures is a variant of that. It is hard to imagine why taking the tonsils out will stop this cough unless they are chronically infected. I would suggested finding out the cause of the cough as the most important thing to do. If this is an upper airway drainage, then, maybe, inhaled nasal steroids will work. If the cause of the cough is from the lower airways, they will have no effect at all.
I sure hope some suggestions for your daughter come from others. I have had a 9 year chronic cough and luckily have not had any seziures following the coughing spells. It happens all day, every day. I too have been to the Ear Nose & Throat doctors with no answers, have had TB tests, chest X-rays, labs, all negative..
Good luck!!
Contact info is available here:
http://nationaljewish.org/patient-info/become/index.aspx
They are the #1 respiratory hospital in the US for good reason. Their docs and staff are excellent and I have had great results with them.
Good luck!
Starion
I am not necessarily saying that your daughter has the same illness, but your ear, nose and throat doctor may not be the ultimate authority. At the very least, get a second opinion!!